BSC 109 Lecture Notes - Lecture 2: Ionic Bonding, Covalent Bond, Sodium Chloride

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Anything that has mass and takes up space. 92 naturally occur, 25 are essential to life. Deficiency in essential elements can lead to disease/ gravely effect health. 2 or more elements coming together and interacting. Behaves differently than each specific element that make it up. Give structure to all of matter and all of life. Positively charged ion: if an atom or molecule loses electrons. Negatively charged ion: forms if an atom or molecule gains electrons. Ionic bond: attractive force between oppositely charged ions. Contain polar covalent bonds in which there is unequal sharing of electrons. Weak attraction between oppositely charged regions of polar molecules. Smallest functional unit that retains the properties of an element. Electrons in outermost shell determines how it interacts with other atoms. Potential energy can be transformed to kinetic energy. Earth"s large bodies of water keep temperatures from rising and falling drastically. Water absorbs the earth"s excess heat, and then evaporates.

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